ceph/src/boost/libs/mp11/test/mp_from_sequence.cpp

   1
   2 // Copyright 2017 Peter Dimov.
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 //
   6 // See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt
   8
   9
  10 #include <boost/mp11/algorithm.hpp>
  11 #include <boost/mp11/integral.hpp>
  12 #include <boost/mp11/integer_sequence.hpp>
  13 #include <boost/core/lightweight_test_trait.hpp>
  14 #include <type_traits>
  15
  16 template<class T, T... I> struct S;
  17
  18 int main()
  19 {
  20     using boost::mp11::mp_list;
  21     using boost::mp11::mp_from_sequence;
  22     using boost::mp11::mp_int;
  23     using boost::mp11::mp_size_t;
  24     using boost::mp11::make_integer_sequence;
  25     using boost::mp11::make_index_sequence;
  26
  27     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int>>, mp_list<>>));
  28     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1>>, mp_list<mp_int<1>>>));
  29     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1, 3>>, mp_list<mp_int<1>, mp_int<3>>>));
  30     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1, 3, 5>>, mp_list<mp_int<1>, mp_int<3>, mp_int<5>>>));
  31
  32     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 0>>, mp_list<>>));
  33     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 1>>, mp_list<mp_int<0>>>));
  34     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 2>>, mp_list<mp_int<0>, mp_int<1>>>));
  35     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 3>>, mp_list<mp_int<0>, mp_int<1>, mp_int<2>>>));
  36
  37     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<0>>, mp_list<>>));
  38     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<1>>, mp_list<mp_size_t<0>>>));
  39     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<2>>, mp_list<mp_size_t<0>, mp_size_t<1>>>));
  40     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<3>>, mp_list<mp_size_t<0>, mp_size_t<1>, mp_size_t<2>>>));
  41
  42     return boost::report_errors();
  43 }